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From: Wojciech Puchar <wojtek@puchar.net>
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Subject: help with backlight control and memory
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bought new laptop. it's lenovo B590

most things works fine. but brightness control keys doesn't work after 
FreeBSD is loaded. they work before it.

i don't ask for a solution but any point to start. What should i check?

is it ACPI tables problem (kernel shows some errors).

Other question - can amount of memory dedicated to GFX card be changed? 
There is no option in BIOS setup to do this. and i have lots of memory 
wasted as you may see below.



Copyright (c) 1992-2014 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
 	The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 10.1-BETA1 #4: Wed Oct 15 23:56:56 CEST 2014
     root@laptop:/usr/src/sys/amd64/compile/laptop amd64
FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512
CPU: Intel(R) Celeron(R) CPU 1005M @ 1.90GHz (1895.73-MHz K8-class CPU)
   Origin = "GenuineIntel"  Id = 0x306a9  Family = 0x6  Model = 0x3a  Stepping = 9
   Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
   Features2=0xdbae3bf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,XSAVE,OSXSAVE>
   AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
   AMD Features2=0x1<LAHF>
   Structured Extended Features=0x281<FSGSBASE,SMEP,ERMS>
   VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID
   TSC: P-state invariant, performance statistics
real memory  = 2147483648 (2048 MB)
avail memory = 1585037312 (1511 MB)
Event timer "LAPIC" quality 600
ACPI APIC Table: <LENOVO TP-H9   >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s)
  cpu0 (BSP): APIC ID:  0
  cpu1 (AP): APIC ID:  2
ioapic0 <Version 2.0> irqs 0-23 on motherboard
random: <Software, Yarrow> initialized
iscsi: version 2.3.1
kbd1 at kbdmux0
cryptosoft0: <software crypto> on motherboard
acpi0: <LENOVO TP-H9> on motherboard
ACPI Error: No handler for Region [ECOR] (0xfffff80001710400) [EmbeddedControl] (20130823/evregion-178)
ACPI Error: Region EmbeddedControl (ID=3) has no handler (20130823/exfldio-320)
ACPI Error: Method parse/execution failed [\134_SB_.PCI0.LPCB.H_EC._REG] (Node 0xfffff8000171e200), AE_NOT_EXIST (20130823/psparse-553)
acpi0: Power Button (fixed)
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 950
Event timer "HPET" frequency 14318180 Hz quality 550
Event timer "HPET1" frequency 14318180 Hz quality 440
Event timer "HPET2" frequency 14318180 Hz quality 440
Event timer "HPET3" frequency 14318180 Hz quality 440
Event timer "HPET4" frequency 14318180 Hz quality 440
Event timer "HPET5" frequency 14318180 Hz quality 440
Event timer "HPET6" frequency 14318180 Hz quality 440
atrtc0: <AT realtime clock> port 0x70-0x77 irq 8 on acpi0
atrtc0: Warning: Couldn't map I/O.
Event timer "RTC" frequency 32768 Hz quality 0
attimer0: <AT timer> port 0x40-0x43,0x50-0x53 irq 0 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
acpi_ec0: <Embedded Controller: GPE 0x17> port 0x62,0x66 on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
vgapci0: <VGA-compatible display> port 0x3000-0x303f mem 0x90000000-0x903fffff,0x80000000-0x8fffffff irq 16 at device 2.0 on pci0
agp0: <IvyBridge mobile GT1 IG> on vgapci0
agp0: aperture size is 256M, detected 32764k stolen memory
vgapci0: Boot video device
xhci0: <Intel Panther Point USB 3.0 controller> mem 0x90600000-0x9060ffff irq 21 at device 20.0 on pci0
xhci0: 32 byte context size.
xhci0: Port routing mask set to 0xffffffff
usbus0 on xhci0
pci0: <simple comms> at device 22.0 (no driver attached)
ehci0: <Intel Panther Point USB 2.0 controller> mem 0x9061a000-0x9061a3ff irq 16 at device 26.0 on pci0
usbus1: EHCI version 1.0
usbus1 on ehci0
hdac0: <Intel Panther Point HDA Controller> mem 0x90610000-0x90613fff irq 22 at device 27.0 on pci0
pcib1: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> irq 17 at device 28.1 on pci0
pci2: <ACPI PCI bus> on pcib2
pci2: <network> at device 0.0 (no driver attached)
pcib3: <ACPI PCI-PCI bridge> irq 19 at device 28.3 on pci0
pci3: <ACPI PCI bus> on pcib3
re0: <RealTek 8168/8111 B/C/CP/D/DP/E/F/G PCIe Gigabit Ethernet> port 0x2000-0x20ff mem 0x90404000-0x90404fff,0x90400000-0x90403fff irq 19 at device 0.0 on pci3
re0: Using 1 MSI-X message
re0: ASPM disabled
re0: Chip rev. 0x2c800000
re0: MAC rev. 0x00100000
miibus0: <MII bus> on re0
ukphy0: <Generic IEEE 802.3u media interface> PHY 1 on miibus0
ukphy0:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto, auto-flow
re0: Ethernet address: 54:ee:75:13:f2:6b
ehci1: <Intel Panther Point USB 2.0 controller> mem 0x90619000-0x906193ff irq 23 at device 29.0 on pci0
usbus2: EHCI version 1.0
usbus2 on ehci1
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
ahci0: <Intel Panther Point AHCI SATA controller> port 0x3088-0x308f,0x3094-0x3097,0x3080-0x3087,0x3090-0x3093,0x3060-0x307f mem 0x90618000-0x906187ff irq 19 at device 31.2 on pci0
ahci0: AHCI v1.30 with 4 6Gbps ports, Port Multiplier not supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich4: <AHCI channel> at channel 4 on ahci0
ahciem0: <AHCI enclosure management bridge> on ahci0
acpi_acad0: <AC Adapter> on acpi0
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_button0: <Sleep Button> on acpi0
acpi_tz0: <Thermal Zone> on acpi0
acpi_tz1: <Thermal Zone> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model Generic PS/2 mouse, device ID 0
battery0: <ACPI Control Method Battery> on acpi0
acpi_ibm0: <IBM ThinkPad ACPI Extras> on acpi0
orm0: <ISA Option ROM> at iomem 0xc0000-0xcefff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
est1: <Enhanced SpeedStep Frequency Control> on cpu1
p4tcc1: <CPU Frequency Thermal Control> on cpu1
fuse-freebsd: version 0.4.4, FUSE ABI 7.8
Timecounters tick every 1.000 msec
ipfw2 (+ipv6) initialized, divert enabled, nat enabled, default to accept, logging disabled
DUMMYNET 0 with IPv6 initialized (100409)
load_dn_sched dn_sched RR loaded
load_dn_sched dn_sched WF2Q+ loaded
load_dn_sched dn_sched FIFO loaded
load_dn_sched dn_sched PRIO loaded
load_dn_sched dn_sched QFQ loaded
hdacc0: <Realtek ALC269 HDA CODEC> at cad 0 on hdac0
hdaa0: <Realtek ALC269 Audio Function Group> at nid 1 on hdacc0
pcm0: <Realtek ALC269 (Analog 2.0+HP/2.0)> at nid 20,21 and 24,25 on hdaa0
hdacc1: <Intel Panther Point HDA CODEC> at cad 3 on hdac0
hdaa1: <Intel Panther Point Audio Function Group> at nid 1 on hdacc1
pcm1: <Intel Panther Point (HDMI/DP 8ch)> at nid 5 on hdaa1
random: unblocking device.
usbus0: 5.0Gbps Super Speed USB v3.0
usbus1: 480Mbps High Speed USB v2.0
usbus2: 480Mbps High Speed USB v2.0
ACPI Error: No handler for Region [ECRM] (0xfffff800017dd180) [EmbeddedControl] (20130823/evregion-178)
ACPI Error: Region EmbeddedControl (ID=3) has no handler (20130823/exfldio-320)
ACPI Error: Method parse/execution failed [\134_TZ_.MDEC] (Node 0xfffff80001725b40), AE_NOT_EXIST (20130823/psparse-553)
ACPI Error: Method parse/execution failed [\134_TZ_.TZS0._SCP] (Node 0xfffff80001725a40), AE_NOT_EXIST (20130823/psparse-553)
ugen2.1: <Intel> at usbus2
uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus2
ugen1.1: <Intel> at usbus1
ugen0.1: <0x8086> at usbus0
uhub1: <0x8086 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0
uhub2: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
ses0 at ahciem0 bus 0 scbus2 target 0 lun 0
ses0: <AHCI SGPIO Enclosure 1.00 0001> SEMB S-E-S 2.00 device
ses0: SEMB SES Device
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <WDC WD5000LPVT-24G33T1 02.01A02> ATA-8 SATA 2.x device
ada0: Serial Number WD-WXL1EB3KUNR5
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
cd0 at ahcich4 bus 0 scbus1 target 0 lun 0
cd0: <HL-DT-ST DVDRAM GTA0N LC00> Removable CD-ROM SCSI-0 device 
cd0: Serial Number KW9E4571958
cd0: 150.000MB/s transfers (SATA 1.x, UDMA2, ATAPI 12bytes, PIO 8192bytes)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
ada0: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
ada0: quirks=0x1<4K>
ada0: Previously was known as ad0
Enter passphrase for ada0d: SMP: AP CPU #1 Launched!
hwpmc: SOFT/16/64/0x67<INT,USR,SYS,REA,WRI> TSC/1/64/0x20<REA> IAP/8/48/0x3ff<INT,USR,SYS,EDG,THR,REA,WRI,INV,QUA,PRC> IAF/3/48/0x67<INT,USR,SYS,REA,WRI>
Timecounter "TSC" frequency 1895731156 Hz quality 1000
uhub1: 8 ports with 8 removable, self powered
uhub0: 3 ports with 3 removable, self powered
uhub2: 3 ports with 3 removable, self powered
ugen2.2: <vendor 0x8087> at usbus2
uhub3: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus2
ugen1.2: <vendor 0x8087> at usbus1
uhub4: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus1
uhub3: 4 ports with 4 removable, self powered
uhub4: 4 ports with 4 removable, self powered
ugen1.3: <Vimicro corp.> at usbus1
ugen1.4: <Generic> at usbus1
umass0: <Generic Flash Card ReaderWriter, class 0/0, rev 2.00/1.00, addr 4> on usbus1
da0 at umass-sim0 bus 0 scbus3 target 0 lun 0
da0: <Multiple Card  Reader 1.00> Removable Direct Access SCSI-0 device 
da0: Serial Number 058F63666435
da0: 40.000MB/s transfers
da0: Attempt to query device size failed: NOT READY, Medium not present
da0: quirks=0x2<NO_6_BYTE>
ugen1.5: <Broadcom Corp> at usbus1
GEOM_ELI: Device ada0d.eli created.
GEOM_ELI: Encryption: AES-CBC 128
GEOM_ELI:     Crypto: software
Trying to mount root from ufs:ada0d.eli []...